Channel-lip-turning method



0d. gs 1924 A. R. RIDDERSTROM CHANNEL LIP TURNING METIXOD Original Fi led Feb. 26

. findrewRRMdw-strqm ence may be had to the said application for Patented Oct. 28, 1%24.

ANDREW B. BIDDERSTEOIVI, 0F NAHANT, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THOMAS C. RO'WEN, O1? SNAIVZESCQTT, MASSACHUSETTS.

OHANNEL-LIP-TURNING- METHOD.

Original application filed February 28, 1920, Serial No. 361,532. "Divided and this application filed September 2, 1922.

To all whom it may concern:

Be it known that 1, ANDREW ROBERT RID- DERs'rRoM, a citizen of the United States, and resident of Nahant, in the county of Essex and Commonwealth of Massachusetts, have invented a new and useful Improvement in Channel-Lip-Turning Methoda of which th following is a specification.

The present invention relates to channellip-turning methods, and more particularly to methods of turning back the channel lips of stiffened soles] Owing to the great strain to which the channel lip is subjected during the operation of opening and turning it and pressing it fiat, the sole must be gripped firmly by the feeding instrumentalities to prevent the sole being pushed bodily away and out of the machine. As the metal stiffener ofa stiffened sole is naturally of harder and less yielding quality than the body of the sole, the firm gripping action causes it to bind in the machine, thereby either clogging up and completely stopping the operation of the machine, or else injuring the sole or even the machine parts. it has accordingly been customary hitherto to turn back the channel lip before attaching the stiffener to the sole.

An object of the present invention is to provide an improved method particularly.

adapted for operation upon stiffened soles. With the above and other ob ects in view, the invention consists of the improved method hereinafter described, illustrated in the accompanying drawings and defined in the appended claims.

In the drawings, Fig. 1 is an elevation, partly in section, of a preferred machine adapted to the carrying out'of the method of the present invention;.Fig. 2 is a detail view showing preferred yielding connection between the feed wheel and its driving mechanism of the machine shown in'Fig. 1; Fig. 3 is a rear elevation of a preferred feed wheel; and Fig. 4 is a perspective view of a shank-stiffened outsole.

The invention is conveniently illustrated in connection with a machine illustrated and described in a copending application,

Serial No. 361,532, of which application the present application is a division. Refera clearer understanding of so much of the Serial N0. 585,909.

is adapted to open, turn over and press fiat a channel lip i of a previously channeled outsole 6, as shown more particularly in Fig. 1. As the lip i is subjected to considerable strain during this operation, the sole must be firmly gripped to prevent its being. pushed outwardly away from the machine. Ihe desired firm gripping action is effected by a toothed feed wheel 8 on one side of the sole and the wiper and a presser foot 10 upon the other. As the sole is advanced by the feed wheel to the wiper, it is guided by an adjustable guide 12 that lies in the sole channel and bears against the shoulder of the lip, and it is gauged'by an adjustable gauge 14:.

sole at one end 20, as shown, or at both ends. As the shank stiffener is usually of steel or other metal, a material that is much harder than the body of the sole, there is a tendency, owing to the above-described firm gripping action of the feeding instrumentalities, for the sole to wedge in between the elements of the feeding mechanism, re-

sulting either in stopping the operation of the machine or in injuring the outsole or the machine parts.

According to the present invention, this difficulty is overcome by preventing the f ed wheel from gripping the shank stiffener. In the illustrative machine, this is effected by making the feed wheel 8 comparativelythin, and mounting it between the guide 12 and the frame of the-machine, Thejfee'd wheel 8 therefore grips the sole only along the edge, adjacent to theshank stiffener. It is desirable, however, to have the shank stiffener gripped also, and a feature" of the present invention contemplates gripping the shank stiffener yieldingly.

t me

This. is efiecte in the illustrative niachineby means of a second feed wheel 22, of smaller diameter than the feed wheel 8, mounted adjacent to the feed wheel 8, in sideby-side relation thereto, to engage the shank stiffener 16 yieldingly. The feed wheel 22 is adapted to yield upon pressure being applied to its periphery, as when pressed inwardly by the shank 16. The specific mechanism for rendering the feed wheel 22 yielding will now be described. The feed wheel 8 is provided with a centrally positioned opening 24 1) through which is adapted to enter a boss 26 that is integralwith a gear 28 that is ro tatably mounted upon an inclined stud 30. The feed wheel 22 is also provided with a centrally positioned opening of greater diameter than that of the boss 26, indicated at 32, whereby it may be loosely mounted uponthe boss 26. The feed wheel 8 is thus, in effect, provided with a centrally, positioned boss which extends intothe opening 32 of the feed wheel 22. The feed wheels are secured against lateral movement along the boss by a securing plate 34. The feed wheel 22 further provided with radial recesses 36 (Fig. 3) having reduced apertures 38 communicating with the central opening 32. Plungers 40 are mounted in the apertures and are spring pressed into the central opening 32 to engage the boss 26 by springs 42 in the radial recesses The feed wheel 22 is thus laterally yieldably mounted upon the feed wheel 8, but is normally, when the machine is not operating, yieldingly maintained in central position v thereon. The feed wheels are adapted to be rotated as a unit by the gear 28 about the stud 30 by connecting them together, as shown more particularly in Figs. 2 and 3, the feed wheel 22 being provided with a pin l4 that enters a slot 46 in the feed wheel 22. The slot 46 is of larger diameter than the diameter of the pin 4A so as to permit the above-described yielding lateral movement of the feed wheel 22 upon the feed wheel 8. I

In operation, the feed wheel 22 yieldingly grips the stiffener shank 16 along the edge, and the feed wheel 8 firmly gripsan adjacent edge portion of the face 18o]? the sole, the wiper 2 and the presser foot 10 at the same time firmly gripping the other face of p the sole at points'op'posed to the feed wheels.

Y sole, the. shank a strai isplaced upon the In case toogreat p 1 6 presses- 1n uponthe periphery oftlie feed -,wheel- 22, cans; w its surface to "yield while the grip upon-the sole is still maintained. Very satisfactory operation is thus obtained. p p

The feed wheel 22 is preferably of slightly smaller diameter than the feed wheel 8 so as to a 'commodate the extra thickness of the shank 16, as shown inFig. 1 To provide.

for a larger bearing surface, the periphery uppermost position, as shown at 48, to compensate for the inclination of the stud 30. The wings of the wiper 2 incline upwardly away from the wiper-carrying shaft, as

shown, so as to cooperate at a suitable angle 1 with the inclined feed wheel 22.

The feed wheel 22 may be of varying thickness, dependent upon the dimensions of the shank of the sole, andits position upon the machine should always be such that the force exerted by the upwardly inclining wings of the wiper, in pressing back the channel lip, shall lie along line L, Fig. 1, parallel to the feed wheel and approximately midway between its faces. The upper. portion of the periphery of the feed wheel 8, consequently, must be positioned between the g .e 12 and the frame of the machine. It therefore becomes necessary to vary the position. of the feed wheel 8 rel atively to the wiper, the presser foot and the guide, depending upon the size and the position of the feed wheel 22. A. preferred construction for effecting the desired adjustment of the feed wheels is described in the above-mentioned application, and cornprises an eccentric pin 60 of an eccentr c post the concentric port-ion of which is journaled in the frame or support 64 of the machine. Rotative adjustmentof the occentric post will result in adjusting the feed wheels. The feed wheels may thus be adjusted laterally, to the right or to the left (Fig. 1) of the wiper wings, as desired. The eccentric post may be rotatably adjust ed by means of a handle 66, and the parts may he clamped thereto by ascrew (not shown). The feed wheels may be separated from the wiper, to permit the introduction of a sole, by a treadle 7O acting, in opposition to the force of a torsion spring 12 that is wound about a drum 74:, to move the feed wheels downward. Upon the treadle being released, the spring eftects a. return of the carrier to its normal position. The teeth of rapidly rotating f ed wheels have a tendency to bite su de .c. i tlr-rou,

slowed down at the moment when it engages the sole, affording it an opportunity to bite deeply into the sole leather before the feeding is resumed at high speed. The feed wheels are so connected. to their driving mechanism as to permit a backward yielding rotative movement of the feed wheels relatively to the driving mechanism. The gear 28 is internally grooved at 8 1 to receive compression springs 86 the ends of which are confined between posts 88 and 90 that are respectively secured to the gear 28 and the feed wheel 8. When a sole is first introduced into the machine, therefore, and the treadle is released, the feed wheels are spring-actuated into engagement with a portion of the sole near the edge and with the shank 16. As the leather is firm enough to overcome the tendency of the springs 84; to keep the feed wheels in the position indicated in Fig. 2, this engagement of the feed wheels by the sole efiects a retarding action which causes the feed wheels to slow down or yield backward relatively to the gear 28 of the driving mechanism. The feed wheels are thus forced to assume their normal feeding position, illustrated in Fig. 1, with the springs 84 under tension, and not until they assume this position do they become fully effective to advance the sole at full speed. The sole is, however, advanced, at a slower speed. While the feed wheels are thus slowing down, the feed wheel 8 is afiorded an opportunity to bite deeply into the leather and obtain a firm grip thereon, the feed wheel 22 at the same time yieldingly gripping the shank 16, and the presser foot and the wiper firmly gripping the other face of the sole at points opposed to the gripping points of the feed wheels. The force of the spring 72 may be adjusted by a handle 76 that is adapted to rotatably adjust the drum, and the drum may be locked in adjusted position by a spring-pressed plunger 78 acting as a pawl to engage the teeth of a ratchet wheel 80. The plunger '78 may be moved upwardly, in opposition to the force of its spring, so as to release the. drum, by a handle 82.

It will be understood that the invention t a j ct to modification,

not limited to the exact embodiment ereof that is herein described, but is subthe scope of the invention being indicated by the appended claims.

lV hat is claimed as new is:

1. The method of turning the channel'lip of a shank-stiffened sole that comprises yieldingly gripping the shank stiffener and firmly gripping adjacent parts of the sole to feed the sole, and turning the channel lip of the sole as it is fed.

2. The method of turning the channel lip of a sole that is stiffened with a shank stiffener applied to one face thereof that comprises firmly gripping the said face of the sole along an edge, yieldingly gripping the shank stifiener, firmly gripping the other face of thesole, feeding the sole while so gripped, and turning the channel lip of the sole as it is fed.

3. The method of turning the channel lip of a sole that is stiffened with a shank stiffener applied to one face thereof. prises firmly gripping the said face of the sole along an edge adjacent to the shank stiffener but without firmly engaging the shank stiffener, firmly gripping the other face of the sole, feeding the sole while so gripped, and turning the channel lip of the sole as it is fed.

4. The method of turning the channel lip of a solethat is stifiened wlth a shank stiffener applied to one face thereof thatcomprises firmly gripping the said face of the sole along an edge adjacent to the shank stiffener, firmly gripping the other face of the sole, feeding the sole, while so gripped, first at a comparatively low speed to prevent damaging the sole and then at a comparatively high speed, and turning the channel lip of the sole as it is fed.

5. The method of turnin of a sole that is stiffened with a shank sti ener applied to one face thereof that comprises firmly gripping the said face of the sole along an edge, y1eldingly gripping the shank stiffener, firmly face of the sole, feedmg the sole, while so gripped, first'at a comparatively low speed to prevent lamaging the sole and then ata comparatively high speed, and turning the channel li of the sole as it is fed.

In testimony whereof, I have hereunto subscribed. my name this 1st day of Septem ber, 1922. I

ANDREW R. RIDDERSTROM.

that com-- g the channel lliqp gripping the other 

